Three channel duct



FIG. 1 is an upper perspective view of the three channel duct showing mydesign.

FIG. 2 is a side view thereof, wherein an opposite side view is a mirrorimage thereof;

FIG. 3 is front view thereof, wherein a back view is a mirror imagethereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

I claim the ornamental design for a three channel duct, as shown anddescribed.